Celtics star Jayson Tatum appeared to suffer a serious ankle/leg injury during Boston's Game 4 loss to the Knicks on Monday.

Boston Celtics star Jayson Tatum appears to have suffered a serious injury in Monday's Game 4 playoff loss against the New York Knicks. Trailing the Knicks in the waning minutes of the fourth quarter, Tatum crumbled to the floor while pursuing a loose ball. He immediately grabbed at the lower part of his right leg in obvious pain.

There have been dozens of times the Celtics star sustained a painful injury, but Tatum would rise to his feet quickly. He couldn’t rise Monday.